Duloxetine hydrochloride is not effective in treating insomnia. Duloxetine hydrochloride is a psychiatric medication. Its main ingredient is duloxetine hydrochloride, which is used to treat depression. Therefore, Duloxetine Hydrochloride is not effective in treating insomnia. This medication is a prescription medication and the usage and dosage is very complex. So just follow the medical advice and use the medicine as prescribed by your doctor. Adverse reactions such as dizziness, nausea, headache, drowsiness, dry mouth may occur when taking Duloxetine Hydrochloride and patients who stop taking the medicine suddenly may experience nightmares, insomnia, abnormal sensations, excessive sweating and vertigo. Patients who are allergic to this drug, patients with untreated narrow-angle glaucoma are prohibited from taking it, and taking duloxetine hydrochloride is prohibited from combining with monoamine oxidase inhibitors to avoid the risk of medication. Duloxetine hydrochloride is a drug for depression, which needs to be used under the guidance of a professional doctor, not blindly self-medication.